Who were the victims in the Washington Navy Yard shooting?

Thirteen people were killed when 34-year-old Aaron Alexis opened fire at the Washington Navy Yard on Monday, Sept. 16. The shooter himself was killed in a gun battle with the police. These are the stories of the victims.

Michael Arnold, 59, Lorton, Va. Michael Arnold's 80-year-old mother, Patricia Arnold, looks at a family photo album that includes pictures of Michael.

Michael Arnold was a Navy veteran and avid pilot who was building a light airplane at his home.

Michael Arnold's uncle, Steve Hunter, said his nephew had been stationed at Pearl Harbor in Hawaii. He worked at the Navy Yard on a team that designed vessels such as the USS Makin Island, a Wasp-class amphibious assault ship used by the Marine Corps.

Michael Arnold and his wife, Jolanda, were married for more than 30 years, Hunter said. They have two grown sons, Eric and Christopher.